Here <netmask2> and <netmask3> are in "number of 1s in binary" form. So for example the address 192.168.0.5/24 corresponds to 192.168.0.5 with netmask 255.255.255.0 because there are 24 1s in this network mask in binary format. Use http://jodies.de/ipcalc if in trouble.